the baby rides with a sure footing ..
题目
the baby rides with a sure footing ..
还有there were two groups of responses ,the first were the babies who cried ,the second were quiet and they were followed up reach junior high school，the first looked at them 最后一句什么意思、the first looked at them
答案
婴儿和一个肯定骑落脚的地方
有两组反应,第一是婴儿哭了,第二个是安静,随访及初中时,第一次看着他们
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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